$OpenBSD: patch-src_graphic_surface_cpp,v 1.1 2011/07/08 20:38:01 naddy Exp $
--- src/graphic/surface.cpp.orig	Tue Jul  5 16:31:24 2011
+++ src/graphic/surface.cpp	Tue Jul  5 16:31:36 2011
@@ -25,6 +25,7 @@
 #include <SDL_image.h>
 #include <SDL_rotozoom.h>
 #include <png.h>
+#include <zlib.h>
 
 #include "graphic/surface.h"
 #include "tool/math_tools.h"
